Installation, Operation, and Maintenance Manual
8 SUMMIT PUMP MODEL 2196 / 2196-LF / 2196-R / 2796
4. OPERATION
LUBRICATION
CAUTION!
PUMPS ARE SHIPPED WITH NO OIL IN
THE BEARING FRAME! Oil must be
installed before operating the pump.
Ball bearings are very sensitive to both over and under lubrication, both being
detrimental to bearing performance. Either case is detrimental to bearing
performance. Use a thermometer to determine overheating. Excessive overheating
will reduce bearing life.
The relationship between temperature and pumpage temperature is an indication of
performance. Table 2 indicates the relationship between these temperatures.
Table 2
Degrees Fahrenheit
Pumping liquid temperature
60° 200° 300°
Approximate normal line bearing temperature
115° 140° 160°
The information shown in Table 2 is based on a room temperature of 70°F. Maximum
bearing temperature is 175°F. The temperatures shown above have a tolerance of plus
15°F. It is necessary to flush water on the shaft for liquid temperatures above 250°F.
This can be done either through a flushing gland or the stuffing box seal cage.
Oil Lubrication
Use only high quality turbine oil with rust and oxidation inhibitors. Service
temperatures determine oil viscosity. See Table 3.
Use a 300 SSU viscosity at 100° F for applications where pumping temperatures are
below 200° F. At pumping temperatures above 350° F, use 470 SSU at 100° F with
optional cooler.
Table 3
Bearing Temperature ISO Grade Viscosity at 100 Degrees F
Up to 150° F
46 215 SSU
150° F to 200° F
68 300 SSU
Above 200° F
100 470 SSU
Grease Lubrication
Regrease grease lubricated bearings with NLG1 No. 2 consistency grease for
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